Share-Based Compensation - Schedule of BitAccess Plan Stock Option Activity (Detail) - $ / shares	6 Months Ended		12 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024	Dec. 31, 2023
Employee Stock Option | Bit Access Plan [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Options - Beginning balance	43,780	43,780	43,780
Options - Granted	0	0
Options - Exercised	0	0
Options - End balance	43,780	43,780	43,780	43,780
Options - Vested and exercisable	27,667	15,235
Weighted-average exercise price - Beginning balance	$ 2.86	$ 2.86	$ 2.86
Weighted-average exercise price - Granted	0	0
Weighted-average exercise price - Exercised	0	0
Weighted-average exercise price - End balance	2.86	2.86	$ 2.86	$ 2.86
Weighted-average exercise price - Vested and exercisable	$ 2.86	$ 0
Weighted-average remaining contractual term - Outstanding	7 years 1 month 6 days	8 years 4 months 6 days	7 years 7 months 6 days	8 years 7 months 6 days
Weighted-average remaining contractual term - Vested and exercisable	7 years 7 days
Weighted-average grant-date fair value - Outstanding	$ 3.09	$ 3.09	$ 3.09	$ 1.21
Weighted-average grant-date fair value - Granted	0	0
Weighted-average grant-date fair value - Exercised	0	0
Weighted-average grant-date fair value - Vested and exercisable	3.04	0.8
Restricted Stock Units (RSUs) [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Weighted-average grant-date fair value - Vested and exercisable	$ 2.44	$ 3.58